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tinySA/os/hal/ports/STM32/GPIOv2/pal_lld.h

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/*
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file STM32/GPIOv2/pal_lld.h
* @brief STM32L1xx/STM32F2xx/STM32F4xx GPIO low level driver header.
*
* @addtogroup PAL
* @{
*/
#ifndef _PAL_LLD_H_
#define _PAL_LLD_H_
#if HAL_USE_PAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Unsupported modes and specific modes */
/*===========================================================================*/
#undef PAL_MODE_RESET
#undef PAL_MODE_UNCONNECTED
#undef PAL_MODE_INPUT
#undef PAL_MODE_INPUT_PULLUP
#undef PAL_MODE_INPUT_PULLDOWN
#undef PAL_MODE_INPUT_ANALOG
#undef PAL_MODE_OUTPUT_PUSHPULL
#undef PAL_MODE_OUTPUT_OPENDRAIN
/**
* @name STM32-specific I/O mode flags
* @{
*/
#define PAL_STM32_MODE_MASK (3 << 0)
#define PAL_STM32_MODE_INPUT (0 << 0)
#define PAL_STM32_MODE_OUTPUT (1 << 0)
#define PAL_STM32_MODE_ALTERNATE (2 << 0)
#define PAL_STM32_MODE_ANALOG (3 << 0)
#define PAL_STM32_OTYPE_MASK (1 << 2)
#define PAL_STM32_OTYPE_PUSHPULL (0 << 2)
#define PAL_STM32_OTYPE_OPENDRAIN (1 << 2)
#define PAL_STM32_OSPEED_MASK (3 << 3)
#define PAL_STM32_OSPEED_LOWEST (0 << 3)
#if defined(STM32F0XX) || defined(STM32F30X) || defined(STM32F37X)
#define PAL_STM32_OSPEED_MID (1 << 3)
#else
#define PAL_STM32_OSPEED_MID1 (1 << 3)
#define PAL_STM32_OSPEED_MID2 (2 << 3)
#endif
#define PAL_STM32_OSPEED_HIGHEST (3 << 3)
#define PAL_STM32_PUDR_MASK (3 << 5)
#define PAL_STM32_PUDR_FLOATING (0 << 5)
#define PAL_STM32_PUDR_PULLUP (1 << 5)
#define PAL_STM32_PUDR_PULLDOWN (2 << 5)
#define PAL_STM32_ALTERNATE_MASK (15 << 7)
#define PAL_STM32_ALTERNATE(n) ((n) << 7)
/**
* @brief Alternate function.
*
* @param[in] n alternate function selector
*/
#define PAL_MODE_ALTERNATE(n) (PAL_STM32_MODE_ALTERNATE | \
PAL_STM32_ALTERNATE(n))
/** @} */
/**
* @name Standard I/O mode flags
* @{
*/
/**
* @brief This mode is implemented as input.
*/
#define PAL_MODE_RESET PAL_STM32_MODE_INPUT
/**
* @brief This mode is implemented as input with pull-up.
*/
#define PAL_MODE_UNCONNECTED PAL_MODE_INPUT_PULLUP
/**
* @brief Regular input high-Z pad.
*/
#define PAL_MODE_INPUT PAL_STM32_MODE_INPUT
/**
* @brief Input pad with weak pull up resistor.
*/
#define PAL_MODE_INPUT_PULLUP (PAL_STM32_MODE_INPUT | \
PAL_STM32_PUDR_PULLUP)
/**
* @brief Input pad with weak pull down resistor.
*/
#define PAL_MODE_INPUT_PULLDOWN (PAL_STM32_MODE_INPUT | \
PAL_STM32_PUDR_PULLDOWN)
/**
* @brief Analog input mode.
*/
#define PAL_MODE_INPUT_ANALOG PAL_STM32_MODE_ANALOG
/**
* @brief Push-pull output pad.
*/
#define PAL_MODE_OUTPUT_PUSHPULL (PAL_STM32_MODE_OUTPUT | \
PAL_STM32_OTYPE_PUSHPULL)
/**
* @brief Open-drain output pad.
*/
#define PAL_MODE_OUTPUT_OPENDRAIN (PAL_STM32_MODE_OUTPUT | \
PAL_STM32_OTYPE_OPENDRAIN)
/** @} */
/* Discarded definitions from the ST headers, the PAL driver uses its own
definitions in order to have an unified handling for all devices.
Unfortunately the ST headers have no uniform definitions for the same
objects across the various sub-families.*/
#undef GPIOA
#undef GPIOB
#undef GPIOC
#undef GPIOD
#undef GPIOE
#undef GPIOF
#undef GPIOG
#undef GPIOH
#undef GPIOI
/**
* @name GPIO ports definitions
* @{
*/
#define GPIOA ((stm32_gpio_t *)GPIOA_BASE)
#define GPIOB ((stm32_gpio_t *)GPIOB_BASE)
#define GPIOC ((stm32_gpio_t *)GPIOC_BASE)
#define GPIOD ((stm32_gpio_t *)GPIOD_BASE)
#define GPIOE ((stm32_gpio_t *)GPIOE_BASE)
#define GPIOF ((stm32_gpio_t *)GPIOF_BASE)
#define GPIOG ((stm32_gpio_t *)GPIOG_BASE)
#define GPIOH ((stm32_gpio_t *)GPIOH_BASE)
#define GPIOI ((stm32_gpio_t *)GPIOI_BASE)
/** @} */
/*===========================================================================*/
/* I/O Ports Types and constants. */
/*===========================================================================*/
/**
* @brief STM32 GPIO registers block.
*/
typedef struct {
volatile uint32_t MODER;
volatile uint32_t OTYPER;
volatile uint32_t OSPEEDR;
volatile uint32_t PUPDR;
volatile uint32_t IDR;
volatile uint32_t ODR;
volatile union {
uint32_t W;
struct {
uint16_t set;
uint16_t clear;
} H;
} BSRR;
volatile uint32_t LCKR;
volatile uint32_t AFRL;
volatile uint32_t AFRH;
volatile uint32_t BRR;
} stm32_gpio_t;
/**
* @brief GPIO port setup info.
*/
typedef struct {
/** Initial value for MODER register.*/
uint32_t moder;
/** Initial value for OTYPER register.*/
uint32_t otyper;
/** Initial value for OSPEEDR register.*/
uint32_t ospeedr;
/** Initial value for PUPDR register.*/
uint32_t pupdr;
/** Initial value for ODR register.*/
uint32_t odr;
/** Initial value for AFRL register.*/
uint32_t afrl;
/** Initial value for AFRH register.*/
uint32_t afrh;
} stm32_gpio_setup_t;
/**
* @brief STM32 GPIO static initializer.
* @details An instance of this structure must be passed to @p palInit() at
* system startup time in order to initialize the digital I/O
* subsystem. This represents only the initial setup, specific pads
* or whole ports can be reprogrammed at later time.
*/
typedef struct {
/** @brief Port A setup data.*/
stm32_gpio_setup_t PAData;
/** @brief Port B setup data.*/
stm32_gpio_setup_t PBData;
/** @brief Port C setup data.*/
stm32_gpio_setup_t PCData;
/** @brief Port D setup data.*/
stm32_gpio_setup_t PDData;
#if STM32_HAS_GPIOE
/** @brief Port E setup data.*/
stm32_gpio_setup_t PEData;
#endif
#if STM32_HAS_GPIOF
/** @brief Port F setup data.*/
stm32_gpio_setup_t PFData;
#endif
#if STM32_HAS_GPIOG
/** @brief Port G setup data.*/
stm32_gpio_setup_t PGData;
#endif
#if STM32_HAS_GPIOH
/** @brief Port H setup data.*/
stm32_gpio_setup_t PHData;
#endif
#if STM32_HAS_GPIOI
/** @brief Port I setup data.*/
stm32_gpio_setup_t PIData;
#endif
} PALConfig;
/**
* @brief Width, in bits, of an I/O port.
*/
#define PAL_IOPORTS_WIDTH 16
/**
* @brief Whole port mask.
* @details This macro specifies all the valid bits into a port.
*/
#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFF)
/**
* @brief Digital I/O port sized unsigned type.
*/
typedef uint32_t ioportmask_t;
/**
* @brief Digital I/O modes.
*/
typedef uint32_t iomode_t;
/**
* @brief Port Identifier.
* @details This type can be a scalar or some kind of pointer, do not make
* any assumption about it, use the provided macros when populating
* variables of this type.
*/
typedef stm32_gpio_t * ioportid_t;
/*===========================================================================*/
/* I/O Ports Identifiers. */
/* The low level driver wraps the definitions already present in the STM32 */
/* firmware library. */
/*===========================================================================*/
/**
* @brief GPIO port A identifier.
*/
#if STM32_HAS_GPIOA || defined(__DOXYGEN__)
#define IOPORT1 GPIOA
#endif
/**
* @brief GPIO port B identifier.
*/
#if STM32_HAS_GPIOB || defined(__DOXYGEN__)
#define IOPORT2 GPIOB
#endif
/**
* @brief GPIO port C identifier.
*/
#if STM32_HAS_GPIOC || defined(__DOXYGEN__)
#define IOPORT3 GPIOC
#endif
/**
* @brief GPIO port D identifier.
*/
#if STM32_HAS_GPIOD || defined(__DOXYGEN__)
#define IOPORT4 GPIOD
#endif
/**
* @brief GPIO port E identifier.
*/
#if STM32_HAS_GPIOE || defined(__DOXYGEN__)
#define IOPORT5 GPIOE
#endif
/**
* @brief GPIO port F identifier.
*/
#if STM32_HAS_GPIOF || defined(__DOXYGEN__)
#define IOPORT6 GPIOF
#endif
/**
* @brief GPIO port G identifier.
*/
#if STM32_HAS_GPIOG || defined(__DOXYGEN__)
#define IOPORT7 GPIOG
#endif
/**
* @brief GPIO port H identifier.
*/
#if STM32_HAS_GPIOH || defined(__DOXYGEN__)
#define IOPORT8 GPIOH
#endif
/**
* @brief GPIO port I identifier.
*/
#if STM32_HAS_GPIOI || defined(__DOXYGEN__)
#define IOPORT9 GPIOI
#endif
/*===========================================================================*/
/* Implementation, some of the following macros could be implemented as */
/* functions, if so please put them in pal_lld.c. */
/*===========================================================================*/
/**
* @brief GPIO ports subsystem initialization.
*
* @notapi
*/
#define pal_lld_init(config) _pal_lld_init(config)
/**
* @brief Reads an I/O port.
* @details This function is implemented by reading the GPIO IDR register, the
* implementation has no side effects.
* @note This function is not meant to be invoked directly by the application
* code.
*
* @param[in] port port identifier
* @return The port bits.
*
* @notapi
*/
#define pal_lld_readport(port) ((port)->IDR)
/**
* @brief Reads the output latch.
* @details This function is implemented by reading the GPIO ODR register, the
* implementation has no side effects.
* @note This function is not meant to be invoked directly by the application
* code.
*
* @param[in] port port identifier
* @return The latched logical states.
*
* @notapi
*/
#define pal_lld_readlatch(port) ((port)->ODR)
/**
* @brief Writes on a I/O port.
* @details This function is implemented by writing the GPIO ODR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] bits bits to be written on the specified port
*
* @notapi
*/
#define pal_lld_writeport(port, bits) ((port)->ODR = (bits))
/**
* @brief Sets a bits mask on a I/O port.
* @details This function is implemented by writing the GPIO BSRR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] bits bits to be ORed on the specified port
*
* @notapi
*/
#define pal_lld_setport(port, bits) ((port)->BSRR.H.set = (uint16_t)(bits))
/**
* @brief Clears a bits mask on a I/O port.
* @details This function is implemented by writing the GPIO BSRR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] bits bits to be cleared on the specified port
*
* @notapi
*/
#define pal_lld_clearport(port, bits) ((port)->BSRR.H.clear = (uint16_t)(bits))
/**
* @brief Writes a group of bits.
* @details This function is implemented by writing the GPIO BSRR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset the group bit offset within the port
* @param[in] bits bits to be written. Values exceeding the group
* width are masked.
*
* @notapi
*/
#define pal_lld_writegroup(port, mask, offset, bits) \
((port)->BSRR.W = ((~(bits) & (mask)) << (16 + (offset))) | \
(((bits) & (mask)) << (offset)))
/**
* @brief Pads group mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset group bit offset within the port
* @param[in] mode group mode
*
* @notapi
*/
#define pal_lld_setgroupmode(port, mask, offset, mode) \
_pal_lld_setgroupmode(port, mask << offset, mode)
/**
* @brief Writes a logical state on an output pad.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
* @param[in] bit logical value, the value must be @p PAL_LOW or
* @p PAL_HIGH
*
* @notapi
*/
#define pal_lld_writepad(port, pad, bit) pal_lld_writegroup(port, 1, pad, bit)
extern const PALConfig pal_default_config;
#ifdef __cplusplus
extern "C" {
#endif
void _pal_lld_init(const PALConfig *config);
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
iomode_t mode);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_PAL */
#endif /* _PAL_LLD_H_ */
/** @} */
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